Question

Which methods will determine 70% of 42?

Choose all correct answers.


A. Determine 10% of 42, and multiply the result by 7.

B. Determine 1% of 42, and multiply the result by 7.

C. Determine 10% of 42, and multiply the result by 70.

D. Determine 1% of 42, and multiply the result by 70.

Answer 1

Answer:

C

Step-by-step explanation:

Given

(3x + 7)(2x - 6)

Each term in the second factor is multiplied by each term in the first factor, that is

3x(2x - 6) + 7(2x - 6) ← distribute both parenthesis

= 6x² - 18x + 14x - 42 ← collect like terms

= 6x² - 4x - 42 → C